Why is rare to find fossils of animals from before the Cambrian period?

An accident at a chemical factory resulted in contamination of a nearby river. Which of the following types of information would best inform the decisions of local policy makers? A. Prior bacterial counts in the river. B.

Reptiles, such as snakes, become extremely inactive during the winter months. They become active again, hunting for food, when the weather becomes warmer. Which of these would BEST explain why this is true? A) Reptiles are warm-blooded.

How does a plant get the nitrogen from the soil?

What is the black mamba's scientific name?

On what two structures does the radial head pivot during movements such as turning a doorknob

A scientist studied the effects of water on pea seeds. She gave one set of seeds water once each day and the other received water twice a day. She counted the number of seeds that sprouted each day for both groups.

Describe the details you're able to see When viewing specimens with a scanning electron microscope in the microscope activity

Do muscular individuals automatically have a lower heart rate than less muscular individuals?

The modern heliocentric model of planetary motion states that the planets travel around ...

The spine of the scapula separates which two fossae?